Original paper

Molecular phylogenetic study of Frullania subsect. Inflatae (Frullaniaceae, Marchantiophyta) in the Holarctic with description of a new subgenus and three new species

Mamontov, Yuriy S.; Vilnet, Anna A.; Atwood, John J.; Konstantinova, Nadezhda A.

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Nova Hedwigia, Beihefte Beih. 150 (2020), p. 201 - 242

72 references

published: Jul 28, 2020

DOI: 10.1127/nova-suppl/2020/201

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ArtNo. ESP051015000015, Price: 29.00 €

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Abstract

A molecular phylogenetic study of the Holarctic liverworts previously attributed to Frullania subg. Frullania subsect. Inflatae reveals its division into three lineages not closely related to one another. The first lineage is nested within F. subg. Chonanthelia, the second nested within F. subg. Thyopsiella, and the third unites the remaining species within subsect. Inflatae, and is located in a sister group relationship with F. subg. Microfrullania and F. subg. Thyopsiella. In its morphological features, the species of the third lineage are similar to F. subg. Frullania, to which some species of that lineage were traditionally placed. However, F. subg. Frullania is separated by a supported branch from the cluster of subclades which represent the third lineage, as well as F. subg. Diastaloba I, F. subg. Microfrullania and F. subg. Thyopsiella. For these reasons, the third lineage is described as a new subgenus, F. subg. Frullaniopsis subgen. nov. Within this subgenus, four species are resurrected based on morphological and molecular studies: F. cleistostoma, F. saxicola, F. takayuensis and F. wrightii. Additionally, three species are newly described from Eurasia and North America: F. austinii sp. nov., F. neomexicana sp. nov. and F. pseudoinflata sp. nov. Two specimens of autoecious Frullania from USA (New Mexico) allied phylogenetically with F. cleistostoma, are similar to the latter in their perianth beak shape and probably represent at least two semi-cryptic species that require further study with expanded specimen sampling.

Keywords

liverworts • Frullania • Inflatae • molecular phylogeny • taxonomy